i) Which mode of propagation is used by shortwave broadcast services having frequency range from a few MHz upto 30 MHz? Explain diagrammatically how long distance communication can be achieved by this
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![PDF] Performance Evaluation of E32 Long Range Radio Frequency 915 MHz based on Internet of Things and Micro Sensors Data | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/9387f810f9ea867bdfc28acdad678df541f9f495/1-Figure1-1.png "PDF] Performance Evaluation of E32 Long Range Radio Frequency 915 MHz based on Internet of Things and Micro Sensors Data | Semantic Scholar")
PDF] Performance Evaluation of E32 Long Range Radio Frequency 915 MHz based on Internet of Things and Micro Sensors Data | Semantic Scholar
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